1 files changed, 2 insertions, 0 deletions
diff --git a/src/buffer.c b/src/buffer.c
index 554ca145b79..127bfba44e0 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -5505,6 +5505,8 @@ A string is printed verbatim in the mode line except for %-constructs:
   %z -- print mnemonics of keyboard, terminal, and buffer coding systems.
   %Z -- like %z, but including the end-of-line format.
   %e -- print error message about full memory.
+  %@ -- print @ or hyphen.  @ means that default-directory is on a
+        remote machine.
   %[ -- print one [ for each recursive editing level.  %] similar.
   %% -- print %.   %- -- print infinitely many dashes.
 Decimal digits after the % specify field width to which to pad.  */);